America is special in that it is large enough to use their own standard.
It is the reason why the EU can create their own standards that nobody else follows. Like Rohs, the reason your electronics fail at a higher rate than previous electronics. Smaller economies suffer when they can't use/make their neighbors goods.
The North America a huge economy. We can efficiently have our own standard.
Uk and France aren't big enough to dictate their own paper size.
https://en.wikipedia.org/wiki/Paper_size#The_international_s...